Loud-speaking electromagnetic receiver



Patented May 11, 1926.

- UNITED sTATEs PATENT OFFICE.`

LON GA'UHONT, OF PARIS, FRANCE, .ASSIGNOR TO SOCIETE DES ETAIBLISSEMENTB `GAUMONT, OF PAB/IS, FRANCE.

LOUD-SPEAKING ,VELECTROHAGNETIC RECEIV'ER.

Applicationiiled January 23, 1,924. Serial No. 688,080.

TheI said loud-spealing receiver, which can be mounted in a telephone c1rcu1t, comprises a large-surface dlaphragm` constituted by a sheet of pasteboard, paper or the Vlike which is foldedfso as to form a great number of warped elements, the same4 being connected to an electro-magnetic -receiver such as an electromagnet having an armature, whereby the sound" Waves wi11`be greatly simplified, the whole device being mounted upon a support Whose` base is of sufficient size to offer'a'll the required stabilty.

- The appended drawings represent the said loud-speaking apparatus, Fig. 1 being a' side elevation and Fig. 2 a perspective view of the rearpart.

Referring to the drawings, the device comvprises a support having a heavv base portion c' to which is integrally secure an upwardly curving arm c; Secured in any suitable manner to the underside of the upper extrem'ity of nrm -c is a s'pider which consists of a central annular portionfrom which extend three radial arms b that are preferably spaced a art at an a-ngular distance of 120. Secure .in any desired manner to the outer ends of the arms'b, is an annular memher or ringa' which engages and's'ecurely holdsthe periphery of a pleated -diaphragm o of the Lumiere type.

Mounted in the annular portion of the spider is an electromagetic receiver ol of the telephone type which is operatively connected in any desired manner to the center of the diaphragm Suitable means are provided for ,connect-1 ing the electromagnetic'device to the output side of an electric circuit. In the form shown, this means comprises terminai members e provided on the uppei' surface of `the receiver, to which terminals are connected lead wires f which pass through a suitable passageway in the arm o. The upper end of this passageway terminatcs in the lower side of the arm c immediately in the rear of the point where the spider is connected to said arm and directly over the terminals e. The central portion of the passageway is' formed as an open groove in the rear of the uppor half of the arm c which groove communicates at its lower end with a passageu'ay that terminates adjacent the lower end of the rear face of said arm. Preferably an adjusting member g is operatively connected to the element connecting the diaphragm and receiver for regulating the amplitude of Vibration of said diav ing a support having a base portion and an upwardly curving arm'portion, a spider comp'rising a central annular portion and a plurality of radial arms Secured to the upper end of the supportingarm, an annular membei` Secured to the extremities of said radial arms, a pleated diaphragm attached at its periphery to said member, electromagnetic means-supported by the armular portion of said spider, and means'operatively connecting said electromagnetic 'means and diaphragm. f

8. A support for a loud Speaker of the pleatcd diaphragin type comprising a base, an upwardly curving arm formed integrally with said base'and having'a passageway therein for receivinff Circuit. connecting wires, a spider having a central annularportion for receivingl an electromagnetic member and having a plurality of radiali'arms formed integrally therewith, and a ring secured. to the extremities of said arms for supporting the diaphragm. In testimony whereof I have signed this specification.

LON GAUMONT. 

